be (as) sick as a dog

be (as) sick as a dog

slang To be very ill. Honestly, I haven't been avoiding you—I've been sick as a dog. I had to go to the doctor on Monday because I was as sick as a dog all weekend.
See also: dog, sick
Farlex Dictionary of Idioms.
See also:
  • (as) sick as a dog
  • sick as a dog
  • hunt
  • dog eat dog
  • dog-eat-dog
  • a dog-eat-dog world
  • my dawg
  • my dog
  • my dogg
  • walk the dog